Add custom filter field which is not model field

[0xSullivan]

Hey
I was using an old version of django-filter and I added some non-model fields for filtering. for example for user I added a name filter with custom method which concats first_name and last_name and filter both of them but there is no name field in the User model.
After I updated to the latest version I faced this error:

TypeError: 'Meta.fields' must not contain non-model field names: name

I checked the codes and I found out this error happen here. in the comment it say warn if the field doesn't exist. but it actually raise a TypeError in line 349

I think it's better to make it a REAL warning instead a ERROR

[carltongibson]

Can you provide a minimal reproduce please, as it's not possible to see what's going on from the information given so far.

[gone]

A sample filter/model that replicates this:

class Profile(models.Model):
    location = models.CharField(_("location"), max_length=30)
    organization = models.CharField(_("organization"), max_length=30)
    title = models.CharField(_("title"), max_length=30)


class ProfileFilter(django_filters.FilterSet):
    search = django_filters.CharFilter(label="search", method="search")

    def search(self, queryset, name, value):
        return queryset

    class Meta:
        model = Profile
        fields = ("location", "organization", "title", "search")

The intent here would be that search isn't attached directly to the model, but appears in the fields list.

[gone]

Ug duplicate name error. Just name your filter something different than your method.